Tuesday, October 25, 2011

Formation of chords on keyboard - part II

Simple way to construct and remember chords:

In the first part we have seen how the major and minor chords are constructed by using a very simple formula. Now we will see how the other  2 important chords namely diminished & augmented chords are built.

Diminished chords:
The simple formula which, straight way gives the diminished chord is:
The 3 notes in a diminished traid chord = Root key, 3rd keyfrom root key, 3rd key from the 2nd note. 
Diminished chord C:  C  D#  F# (5, 3, 2 finger of left hand)
1st note  : C    is the first note being the root note for C chord.
2nd note: D# is the 3rd key from C (i.e.C# > D > D#)
3rd note : F#  is the 3rd key from D# (i.e. E > F > F#)


Similarly all 12 chords can be calculated and remembered.
However it is more easy to remember by turning major chord into minor, diminished or augmented.
Example: By lowering the 2nd note half step we turn the major chord into a minor chord. 

Now how to turn major chord in to diminished chord ?

Major chord          :   (root note)   (2nd note)                      (3rd note)
Diminished chord:   (root note)   (lowered by half step)  (lowered by half step)
(half step means just one key raised or lowered)

CM    :      C       E       G
C dim:      C       D#    F#

Augmented Chords:

The 3 notes in a augmented chord are :  Root key, 4th key from root note, 4th key from the 2nd note.
Augmented chord C :  C  E  G#
1st note   : C    is the root key.
2nd note : E    is the 4th key from C (i.e. C# > D > D# > E)
3rd note  : G# is the 4th key from E (i.e. F > F# > G > G#)

How to turn major chord into augmented chord?

Major Chord         :     (root note)     (2nd note)     (3rd note)
Augmented Chord :   (root note)     (2nd note)     (raised by half step) 

CM    :     C    E    G
C aug :    C    E    G#